The fastest way to make a lesson is to describe it to the Educator Agent.
Asking for a lesson
Click Agent in the sidebar and say what you want.
Say the year group, the subject, roughly how many questions and of what kind. "A Grade 9 lesson on the water cycle, four multiple choice and one long answer with a mark scheme" gives a far better first draft than "a lesson about water".
Building from your own material
Use Attach to give it your worksheet, notes or past paper, and ask it to build from that. Keep the questions and the memo in the same file, or the mark scheme it writes may not match your paper.
The lesson lands in My Library as a draft. Read it before you publish: the agent is good but it is your name on the lesson.